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authorFederico Vaga <federico.vaga@cern.ch>2017-07-18 09:33:03 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-08-28 17:24:21 +0300
commit2071a3e94abd34d65bd40f1ff845f9cea300dfa6 (patch)
tree7b115bbaf53ff854af74bc6b907bdd39688adc28 /drivers/fmc/fmc-debug.c
parent9f757f415210a7c85e2784e4a1733ea78b2e4e88 (diff)
downloadlinux-2071a3e94abd34d65bd40f1ff845f9cea300dfa6.tar.xz
drivers/fmc: The only way to dump the SDB is from debugfs
Driver should not call fmc_sdb_dump() anymore. (actually they can but the operation is not supported, so it will print an error message) Signed-off-by: Federico Vaga <federico.vaga@cern.ch> Tested-by: Pat Riehecky <riehecky@fnal.gov> Acked-by: Alessandro Rubini <rubini@gnudd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fmc/fmc-debug.c')
-rw-r--r--drivers/fmc/fmc-debug.c173
1 files changed, 173 insertions, 0 deletions
diff --git a/drivers/fmc/fmc-debug.c b/drivers/fmc/fmc-debug.c
new file mode 100644
index 000000000000..32930722770c
--- /dev/null
+++ b/drivers/fmc/fmc-debug.c
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2015 CERN (www.cern.ch)
+ * Author: Federico Vaga <federico.vaga@cern.ch>
+ *
+ * Released according to the GNU GPL, version 2 or any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <asm/byteorder.h>
+
+#include <linux/fmc.h>
+#include <linux/sdb.h>
+#include <linux/fmc-sdb.h>
+
+#define FMC_DBG_SDB_DUMP "dump_sdb"
+
+static char *__strip_trailing_space(char *buf, char *str, int len)
+{
+ int i = len - 1;
+
+ memcpy(buf, str, len);
+ buf[len] = '\0';
+ while (i >= 0 && buf[i] == ' ')
+ buf[i--] = '\0';
+ return buf;
+}
+
+#define __sdb_string(buf, field) ({ \
+ BUILD_BUG_ON(sizeof(buf) < sizeof(field)); \
+ __strip_trailing_space(buf, (void *)(field), sizeof(field)); \
+ })
+
+/**
+ * We do not check seq_printf() errors because we want to see things in any case
+ */
+static void fmc_sdb_dump_recursive(struct fmc_device *fmc, struct seq_file *s,
+ const struct sdb_array *arr)
+{
+ unsigned long base = arr->baseaddr;
+ int i, j, n = arr->len, level = arr->level;
+ char tmp[64];
+
+ for (i = 0; i < n; i++) {
+ union sdb_record *r;
+ struct sdb_product *p;
+ struct sdb_component *c;
+
+ r = &arr->record[i];
+ c = &r->dev.sdb_component;
+ p = &c->product;
+
+ for (j = 0; j < level; j++)
+ seq_printf(s, " ");
+ switch (r->empty.record_type) {
+ case sdb_type_interconnect:
+ seq_printf(s, "%08llx:%08x %.19s\n",
+ __be64_to_cpu(p->vendor_id),
+ __be32_to_cpu(p->device_id),
+ p->name);
+ break;
+ case sdb_type_device:
+ seq_printf(s, "%08llx:%08x %.19s (%08llx-%08llx)\n",
+ __be64_to_cpu(p->vendor_id),
+ __be32_to_cpu(p->device_id),
+ p->name,
+ __be64_to_cpu(c->addr_first) + base,
+ __be64_to_cpu(c->addr_last) + base);
+ break;
+ case sdb_type_bridge:
+ seq_printf(s, "%08llx:%08x %.19s (bridge: %08llx)\n",
+ __be64_to_cpu(p->vendor_id),
+ __be32_to_cpu(p->device_id),
+ p->name,
+ __be64_to_cpu(c->addr_first) + base);
+ if (IS_ERR(arr->subtree[i])) {
+ seq_printf(s, "SDB: (bridge error %li)\n",
+ PTR_ERR(arr->subtree[i]));
+ break;
+ }
+ fmc_sdb_dump_recursive(fmc, s, arr->subtree[i]);
+ break;
+ case sdb_type_integration:
+ seq_printf(s, "integration\n");
+ break;
+ case sdb_type_repo_url:
+ seq_printf(s, "Synthesis repository: %s\n",
+ __sdb_string(tmp, r->repo_url.repo_url));
+ break;
+ case sdb_type_synthesis:
+ seq_printf(s, "Bitstream '%s' ",
+ __sdb_string(tmp, r->synthesis.syn_name));
+ seq_printf(s, "synthesized %08x by %s ",
+ __be32_to_cpu(r->synthesis.date),
+ __sdb_string(tmp, r->synthesis.user_name));
+ seq_printf(s, "(%s version %x), ",
+ __sdb_string(tmp, r->synthesis.tool_name),
+ __be32_to_cpu(r->synthesis.tool_version));
+ seq_printf(s, "commit %pm\n",
+ r->synthesis.commit_id);
+ break;
+ case sdb_type_empty:
+ seq_printf(s, "empty\n");
+ break;
+ default:
+ seq_printf(s, "UNKNOWN TYPE 0x%02x\n",
+ r->empty.record_type);
+ break;
+ }
+ }
+}
+
+static int fmc_sdb_dump(struct seq_file *s, void *offset)
+{
+ struct fmc_device *fmc = s->private;
+
+ if (!fmc->sdb) {
+ seq_printf(s, "no SDB information\n");
+ return 0;
+ }
+
+ seq_printf(s, "FMC: %s (%s), slot %i, device %s\n", dev_name(fmc->hwdev),
+ fmc->carrier_name, fmc->slot_id, dev_name(&fmc->dev));
+ /* Dump SDB information */
+ fmc_sdb_dump_recursive(fmc, s, fmc->sdb);
+
+ return 0;
+}
+
+
+static int fmc_sdb_dump_open(struct inode *inode, struct file *file)
+{
+ struct fmc_device *fmc = inode->i_private;
+
+ return single_open(file, fmc_sdb_dump, fmc);
+}
+
+
+const struct file_operations fmc_dbgfs_sdb_dump = {
+ .owner = THIS_MODULE,
+ .open = fmc_sdb_dump_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+int fmc_debug_init(struct fmc_device *fmc)
+{
+ fmc->dbg_dir = debugfs_create_dir(dev_name(&fmc->dev), NULL);
+ if (IS_ERR_OR_NULL(fmc->dbg_dir)) {
+ pr_err("FMC: Cannot create debugfs\n");
+ return PTR_ERR(fmc->dbg_dir);
+ }
+
+ fmc->dbg_sdb_dump = debugfs_create_file(FMC_DBG_SDB_DUMP, 0444,
+ fmc->dbg_dir, fmc,
+ &fmc_dbgfs_sdb_dump);
+ if (IS_ERR_OR_NULL(fmc->dbg_sdb_dump))
+ pr_err("FMC: Cannot create debugfs file %s\n",
+ FMC_DBG_SDB_DUMP);
+
+ return 0;
+}
+
+void fmc_debug_exit(struct fmc_device *fmc)
+{
+ if (fmc->dbg_dir)
+ debugfs_remove_recursive(fmc->dbg_dir);
+}